Catalytic Ozonation of Succinic Acid in Aqueous Solution by Co/Al2O3-EPM: Performance, Characteristics, and Reaction Mechanism

Abstract

Abstract In this study, the high-reactive Co/Al2O3-EPM (prepared by electroless plating method) were used for catalytic ozonation. On account of the powerless degradation of small molecule acid by ozone alone, succinic acid (SA), a kind of small molecule acid, was selected as the simulated pollutant to evaluate the performance of Co/Al2O3-EPM in Co/Al2O3-EPM/O3 system. First, several key preparation parameters of Co/Al2O3-EPM and operational parameters in Co/Al2O3-EPM/O3 system for SA removal were optimized. The maximum SA removal (100%) and the total organic carbon (TOC) removal (66.9%) were obtained under the optimal conditions. Second, the superior performance of Co/Al2O3-EPM/O3 system for SA removal was confirmed by four control experiments (i.e., Co/Al2O3-EPM alone, O3 alone, Co/Al2O3-IM alone, and Co/Al2O3-IM/O3 systems). The conversion and mineralization of SA were investigated by high-performance liquid chromatography and TOC analyzer, respectively. The stability of different systems was evaluated...